Danfoss WS103, Technical Information

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For a country-specific or standard-specific operation in the 2.4 GHz and 5 GHz frequency bands following
channel lists are available on WS103. The 5 GHz channels can be combined.
•
World (2.4 GHz) - 1-11
•
FCC (2.4 GHz) - 1-11
•
ETSI (2.4 GHz) - 1-13
•
TELEC (2.4 GHz) - 1-13
•
U-NII-1 (5 GHz) - 36, 40, 44, 48 (FCC, IC, ETSI domain)
•
U-NII-2 (5 GHz) - 52, 56, 60, 64 (FCC, IC, ETSI domain)
•
U-NII-2e (5 GHz) - 100, 104, 108, 112, 116, 132, 136, 140 (IC domain)
•
U-NII-3 (5 GHz) - 149, 153, 157, 161, 165 (FCC domain)
W
Warning
•
If the frequency bands are U-NII-2 (5.260 to 5.320 GHz) and U-NII-2 extended (5.500 to 5.700 GHz), the
module can be operated as a DFS slave / client device.
•
The Japan Radio Equipment Compliance (TELEC) only approves the use of the 2.4 GHz frequency band
(channels 1-13). The operation of the module in the 5 GHz frequency band is prohibited in Japan.
•
If the frequency band is 5150 MHz to 5250 MHz (5 GHz, channel 34-48), the module is limited to
operation within buildings to reduce any possibility of harmful interference to co-channel MSS
operations.
WLAN mode infrastructure
There are two types of WLAN topologies: the ad-hoc mode and the infrastructure mode. The
infrastructure mode, is used to incorporate the wireless clients into an existing wired LAN infrastructure.
In the infrastructure mode all communication is passed through the Access Points (APs) that are
connected to the wired LAN. A single AP communicating with a number of clients is called a Basic Service
Set (BSS). A number of interconnected APs with the same network name is called an Extended Service Set
(ESS). An AP that holds information about the mobile clients authorized to enter the system is called an
autonomous AP (or "fat" AP), whereas an AP that only is responsible for forwarding received data, is
called a controller-based AP (or "thin" AP). While the autonomous APs carry out all wired to wireless
packet format conversion, encryption, QoS application, and RF statistics monitoring, the very thinnest
APs pass all of this to their central controller, and act basically just as a media converter.
WLAN infrastructure and PLUS+1
®
Service Tool
With WS103 installed on the CANbus of a machine equipped with PLUS+1 ® control system, it can be
configured to be connected to an AP and Service Tool program running on a laptop connected to the
same AP the user can connect wireless to a PLUS+1
® control system and manage it remotely. For more
information see the installation guide document.
WLAN CAN to CAN bridging
Two WS103 modules can be configured as a CAN-CAN bridge. Every (or selected) CAN message received
by one WS103 is sent through Wi-Fi
® and managed by the second WS103. For more information see
WS103 Remote Solution Installation Guide , AN00000339.
Access control and security
Since the physical layer in a WLAN is broadcast over the air, the normal methods to control a
conventional LAN cannot be used.
To secure the WLAN from intruders, authentication and encryption are important factors. Measures, like
creating a MAC address filter, make it a little more difficult for intruders to access and use the WLAN.
There are stronger methods, such as using authentication, but these often require dedicated servers or
other hardware.
Technical Information
WS103 Remote Solution
Functions
20 | © Danfoss | April 2016 BC00000365en-US0102